What is the three-dimensional shape of the molecule with this lewis structure?

a.

bent

b.

tetrahedral

c.

trigonal planar

d.

trigonal pyramidal

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

The excretory system, need answers for all: )

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?